table.treetable span.indenter {
  display: inline-block;
  margin: 0;
  padding: 0;
  text-align: right;
  

  /* Disable text selection of nodes (for better D&D UX) */
  user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  -webkit-user-select: none;

  /* Force content-box box model for indenter (Bootstrap compatibility) */
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;

  width: 19px;
}

.a_icon{
  background-position: left center;
  background-repeat: no-repeat;
  display: inline-block;
  text-decoration: none;
  width: 19px;
  /*//此处修改了源码*/
  background-image: url("../../../img/expand.png");
}
.a_icon_collapse{
	background-position: left center;
  background-repeat: no-repeat;
  display: inline-block;
  text-decoration: none;
  width: 19px;
  /*//此处修改了源码*/
  background-image: url("../../../img/collapse.png");
}
/*此处修改了源码*/
.folder{
	background-image: url("../../../img/folder.png");
	display: inline-block;
	width:19px;
	height:17px;
	vertical-align: middle;
	background-repeat: no-repeat;
	margin-top: -2px;
}

#theTable a:hover, #theTable a:focus {
	text-decoration: none;
}
